Moldboard.



W. A. MARTIN a; R. J. COLEMAN. MOLDBOARR APPLICATION FILED IOV. 18,1912.

1,953,248, Patented Apr. 8,1913.

wmvESsEs: mvmons 64.6%@ g g BY W" ATTQBN'EY 'WXLLIAIY A. 'MARTN' ANDRBERT J'. CGLEMN, Si? WAZ'SAHGI-UE, TEXAS; {if-.321

' MARTN ASSIQOR TO SAD ULEMAN.

MOLDBOARB.

Lee

Spec-ica'on of Letters "fate-nt.

Patented Apr. ili

Applica'-ion filed November lok, i312. Serial No. *1311.980.

Be it known that we, Wimmer A.. MARTIN end Roemer J. Cori:univ eiliinsof the United States, residing` et 'llaalmohiein the county of Ellis andSiate of Texas, have .invenled certain new and useful Improvemens inMoldbonrds, of which lelle following ie a. speeiiention.

C'ur invention releleeI to new and. useful improvements in plowmold-boards, and re-' .lates more parlieuleil;r lo certain improvementsupon the mold-hoard covered by Lellors Patent Number 1,036,157 ieeuedAugust 27th, 1912.

The object 0i the invention is to provide a mold-board *het will herendered peculieriy eiiieient in shedding damp or stiel'y soil throughbeing coated with u facing of plaster of Paris, the facing being.retained by e' certain structure which may be reinoved from themollhoerd when it is desii-ed to use the Same 'without the plaster ofParis Coating Jfor plowing dry or szmdysoil,

The ohjee of the inveuiion more specifically stated is lo provide imold-l oard with e removable metal Strip mounted adjacent to ehemold-hoard edge for reziining u coating of plaster el Peris provided. tothe mold-board fece, a. nxefil strep being also embedded in iihe plasterof Paris Coating and Secured lo the mold-board lo furnish furlherretention to lire Coal-ing.

Vil-litfnese end various other objects in View, our invention has,rele-lion to eerilein novel feature?, of the eonstruetion-mi exemple ofwhich is described in the following specification and illustrated in thea@ eoinpanying drawing, wherein:

.Figure l is n, perspeetve View turning plow equipped with he hereindescribed mold-board. Fig. 2 ie dela-il seecienel View of the1nold-boerdthe sect-ion being eiken upon the line X--X of Fig. l.

Referring now more particularly to the drawing, wherein like Areferenceehziraelers deeignete similar pertain both the igures, the numerals l, 2and 3 respectively-denote the benin pointind handle of an ordinaryturning plow. The plow nieldfooerd, which is designated by the numeral4: line secured to ils edges by bells or other suite-.ble ineens a.metal strip 5 which will preferably be made to slightly overhang themold-.board ffice, es'is clearly shown in Fig. 2 of the showing edrawing. 'After lie etrip`5 has heen Secured to ille vfece of themold-hoard plaster of l-uris coating G is evenly applied to hemold-board face, the depth of said comino; being nullieient to bring itsouter Surface flush willi the oulier Surface of the strip 5. Atsubsenlelly *ehe center of ehe moldbonrd, e ine'nl strap '7 is embeddedTin the plaster of Peris eenling, the exposed Surface o'l.E Suid Sirupbeing flush wili the fece 0i the plaster of' .Peris coating, und saidStrap being held against dieplzieenieni; by a boli; passing through ileeenterand through lhe mold-boord 4. The relation. oit' the moldhourd llio the plow point 2 will be such that the surface of the plaster ofPeris coating `will be lush with Jdie .surface of the'ploW point. .f

A plow mold-hoard constructed as above described., is excellent-lj.7adapted to shed Wet or elieky soil and has proven particularlyeilieaeious in what 'is'eommonly known as bleek waxy soil. The moistureof the earth whieli iebeing turned is imparted to the plaster of Pza-riscoating, rendering the surface of seid eoelingee Smooth that the. earthcannot adhere to the seme. If ehe niois'uure of he earth, which is beingplowed is noiI surlieient to impart a. smooth end slippei-y surface tothe plaster of Peris coating, this result may be achieved #y throwingwater upon Seid @outing et intervals cluring' the operniion ol'plowing.

llhen it desired 'lio use ille moldhoerd .in turning dry land or Sandysoil, under which Circumstances no acl'vanlage is eeeured from theplaster of Paris cooling, `ihe perfs 5 :1nd 7 may be reed-ily removed,thus making it possible to scrape oi he Coating und adept the.mold-board for ordinary plowing'.

An importent advantage is secured by adapting he mold-hoard for useeither in (lmnp and sticky soil or in dry and sandy soil since u fermermay thus he enabled io use the suine mold-board during spell of wetweuiher or during dry Seesen, or in Vcese he ine-fers from e regionwhere 'the soil is damp i i el -lry to new loeeion where 'ene Soil ie.sandy und dry viee 've '59.,

his plow will not he rendered uselees by this.

change of location.

'Ehe invention is presented es including all such modifica-viens endchanges esprop- `erlyconfie withinthe scope of `the following ofabsorbent plastic material applied to the face thereof; a rim removablysecured to the mold-board edge, wmetal strap embedded in thegplasticcoating at 'the center thereof,

. 10 the exposed surface of said strap being flush with the face of thecoating, and means securing said strap vto the mold-board. In testimonywhereof We have signed our names to this speciication in the presence oftwo subscribing Witnesses.

WILLIAM A. MARTIN. ROBERT J. COLEMAN. Witnesses: A l

J. E. BATCHLER, VERNEl ROBERTS.

